Design brief
Gantt chart
Decision matrix
Brainstorming list
preliminary sketches
Final sketch
Building process, testing results, modification
To begin our building process as a group we began brainstorming . we started to put machines together and one thing lead to another and we got a general idea. At first we were unsure how to hold everything together, but then we stole the big metal sheet and attached all the pieces to it using axles and end pieces to hold everything on. Our group worked really hard and we all contributed to the project. We tested our design by going over to the light switch and turned it on and off. The tests mostly work and caused us to change our design. At first we had a rubber piece attached to the gear and sprocket to turn the light on but after testing it we determined it was to flexible so we had to change it to a hard plastic piece. Other small changes were made throughout, such as changing the end pieces and adding the pulley. Overall we killed it and no one could come close to the skill our group had thanks to the power of team work and friendship
final design
final calculations
Conclusion Questions
Which mechanism was the easiest to determine the mechanical advantage or drive ratio? Why?
The pulley, the only thing we had to do was count the number of strands in the pulley.
For which mechanism was it the most difficult to determine the mechanical advantage? Why?
The gear train because the large number of teeth needed to be counted then we had to plug in the numbers into the equation number of teeth in/ number of teeth out.
At what value would you estimate the input and output forces of your compound machine? How did you arrive at your estimated values.
What modifications could you make to your compound machine to make it more mechanically efficient?Adding another machine to make the winding up easier. We chose the pulley because it was a quick easy fix. We could have chosen additional gears and a wheel or lever to make our machine work.
Which mechanism was the easiest to determine the mechanical advantage or drive ratio? Why?
The pulley, the only thing we had to do was count the number of strands in the pulley.
For which mechanism was it the most difficult to determine the mechanical advantage? Why?
The gear train because the large number of teeth needed to be counted then we had to plug in the numbers into the equation number of teeth in/ number of teeth out.
At what value would you estimate the input and output forces of your compound machine? How did you arrive at your estimated values.
What modifications could you make to your compound machine to make it more mechanically efficient?Adding another machine to make the winding up easier. We chose the pulley because it was a quick easy fix. We could have chosen additional gears and a wheel or lever to make our machine work.